Functionalization and Melt-compounding of MWCNTs in PA-6 for Tribological Applications

International Conference on Recent Advances in Materials & Manufacturing Technologies

Chopra, Swamini^1 ; Deshmukh, Kavita A.^1 ; Deshmukh, Abhay D.^2 ; Peshwe, D.R.^1

Dept. of Metallurgical and Materials Engineering, Visvesvaraya National Institute of Technology, Nagpur

440010, India^1

Energy Materials and Devices Laboratory, Dept. of Physics, RTM Nagpur University, Nagpur

440010, India^2

关键词: Coefficient of frictions;    Functionalizations;    Functionalized MWCNTs;    Mechanical property evaluation;    Melt-compounding;    Sliding wear;    Specific wear rates;    Tribological applications;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/346/1/012005/pdf
DOI  :  10.1088/1757-899X/346/1/012005

来源: IOP

【 摘 要 】

The present study focuses on the fabrication and mechanical property evaluation of PA-6/MWCNT nanocomposites reinforced with microwave-functionalized MWCNTs. The MWCNTs were subjected to microwave radiation in the solution of H2SO4and HNO3for 3 minutes, with the aim of achieving better and faster functionalization. The change observed in the crystal structure of PA-6 matrix after CNT addition suggested improved nucleation due to well-dispersed MWCNTs after functionalization. The tensile strength of PA-6 increased by approx. 12 % and 15 % after addition of pristine and functionalized MWCNTs, respectively. This was credited to improved interaction between CNTs and PA-6 matrix. The dispersion quality of CNTs in PA-6 matrix was verified by FEG-SEM, while the fractography of composites revealed polymer sheathing of PA-6 matrix around CNTs. This again contributed in improving the elongation of the composites by approx. 10 %. The wear resistance of the composites also improved appreciably, irrespective of the applied load. The specific wear rate of PA-6/CNT nanocomposite reinforced with functionalized MWCNTs increased by approx. 60 to 70 %, while coefficient of friction reduced by approx. 30 to 40%.